Adjustable brake-head.



Patented Mar. 18, 1913.

M www www C. F. MURRAY.

ADJUSTABLE BRAKE HEAD.

APPLICATION FILED AUG.5, 1909.

UNITED STATES PATENT OFFICE.

CHARLES F. MURRAY, OF CHICAGO, ILLINOIS, ASSIGNOE TO SIIVIPLEX RAILWAY APPLIANCE COMPANY, OF CHICAGO, ILLINOIS, A CORFORATION OF ILLINOIS.

ADJUSTABLE BRAIIE-I-IEAD.

Specification of Letters Patent.

Patented Mar. I8, MMS..

Application filed August 5, 1909. Serial No. 511,281.

Be it known that I, CHARLES F. MURRAY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in i-idjustable Brake- Heads, of which the following is a specification.

Various devices have heretofore been devised for locking in adjusted position the brake heads and shoes of car brake-beams, and it is to the improvement of this class of devices that this invention is aimed, its principal object and purpose being to provide a construction of this general character which will be simple, which will be economical to manufacture, which will have substantially all of its parts inclosed within the brakehead proper, and which will effectively and efficiently lock or hold the brake-head in adjusted position.

To carry out my invention therefore in the preferred embodiment thereof, I provide in the sleeve fitted on the end of the brake-beam a recess which accommodates a curved lock-block having an undercut groove. Cn the exterior, cylindrical surface of this sleeve and communicating with the recess is a right angle, open ended grooveor slot which permits the introduction of the head of a tightening bolt into the groove of the block, the bolt extending` outwardly through an aperture or hole through the brake-head and having externally of the latter a tightening nut adapted to draw the locking block outwardly into effective` engagement with the inner surface of the brake-head, whereby to lock and clamp such head in the proper adjusted position. In this particular exemplification of the invention, the locking block is not movable in its recess in the sleeve except outwardly, but the bolt and its head slide readily in the groove of the block, thereby permitting the desired rotary adjustment of the head and shoe, and after such proper position of the parts is secured, the lool; may be actuated by the bolt to lock and secure the head in place.

In the accompanying drawing, I have shown one desirable embodiment of the invention, and in this drawing, Figure l is a section through a brake-head and brakebeam sleeve, the parts being equipped with one form of my improved locking means, and certain parts being broken away to more clearly show the exact construction; Fig. 2 is a section on line 2-2 of Fig. l; Fig. 3 is a fragmentary sect-ion, with parts broken away, similar to Fig. 1, showing the manner of application of the brake head and bolt to the sleeve; Fig. et is a perspective view of the brake-beam sleeve; Fig. 5 is a similar view of the roughened or serrated locking block; and Fig. 6 is a perspective view of the bolt employed for actuating such block.

I have deemed it unnecessary to show an entire brake-beam or the tension and compression members thereof, feeling that it is suflicient to merely illustrate the sleeve l0, which is adapted to be fitted, as will be readily understood by those slrilled in the art, over the ends of the tension and compression members of the brake-beam, the center of such sleeve being provided with the usual aperture 1l for the accommodation and reception of such parts. rI`he outer surface of this sleeve is of the usual cylindrical form, and is supplied, desirably midway its length, with a rectangular, curved recess l2, opening centrally into one end vof which is a right-angle groove I3, one leg la of which is disposed longitudinally of the sleeve and extends to the end thereof, so that the groove at that end I5 is open, as is clearly shown in Fig. 4, and for a purpose hereinafter indicated.

The recess l2 is adapted and intended to accommodate a curved locking block 16 of substantially the same size as the recess, the outer surface of such block being transversely serrated or roughened, as is indicated at 17, the lock-block also having a curved, longitudinal., undercut groove 1S extended inwardly from its outer roughened face, the contracted portion of such groove being' characterized 19 in the drawing.

The brake-head 2O has a cylindrical aperture 2l of practically the same diameter and adapted totit over the brake-beam sleeve l0, as is usual and customary in constructions of this character. A portion of the inner cylindrical surface of this brake-head is serrated or roughened, as at Q2, such surface being adapted to coact and cooperate with the corresponding outer surface 17 of the lock-block, At substantially the middle of this roughened brake-head inner surface, the head is thickened to provide a boss 23, the head having extended through itself and the boss a hole or aperture 24 for the accomioodation ot a bolt 255, the tlat head ZG et which is ot s.ibstantialljy the saine size and adapted to tit in the undercut groove 18.

`e ot the brake-head, 'this tighteningl rt, ot course quite innnaterial.

iissunnng that it is desired to assemble the iarts oit' this device and to tix or lock the brake-head in adjusted position, the lockboclr l@ is placed in its recess 'l2 et the sleeve, the bolt is inserted in the aperture or hole v fith the head ot the bolt inside oit the braliediead, the latter is then brought to the position indicated in Fig, 3, so that the bolt head 26 is in register ivith the open mouth i5 oit the right-angle groove 13. The bralfe-head is then pushed or slid onto the ce tar as it will go, which is deterthe engagement ot end ot the `portion right-angle slot i3. The head ina;y se turned or r tated on the sleeve, the bolhhead ravelingv in the right-angle slot 13 and passing therefrom into the undercut groove i3 ot the loclz-bloclr 16, the contract d or restricted portion 19 et Which in Wi lth substantialljfv equal to the diameter of the shanlr ot the bolt. The bralrehead is noiv brought to the desired. or required adjusted position so that its shoe will properly fit the car-Wheel, this adjustment oit the head being permitted by the tree and easjY travel ot the bolt and its head in the groove oit the lock-block. rihe parts having been brought to this position, the nut-lool; is placed over the bolt and the nut 27 screwed up so as to draw the lock-block 16 outvfardlj7 into ell'ective engagement With the ro-ughened inner surface ot the brakehea d, therebjT securelj7 lockingv and iixing the head in proper adjusted position, backing ott ot the nut due tothe vibration of the bralrebeain beine' prevented by the nut-lock, the portions ot which are bent up and down, as .indicated above, after the nut has been sratai'edv up to the proper place. 'lo talle olil the brake-heath it is nierelj7 necessary to bend bach. the locking portions of the nutlocl; and unserenv the nut 27, after Which the brake-head and its bolt are tree to turn, and after haringbeen rotated so as to bri ng the head oit the bolt into register With the portion lli of the slot 18, the head and boltinaj; be slipped ott et the sleeve, the bolt-head, as is obvious, passing out ot the niouth or open end l5 et the ygroove.

rllhis invention being susceptible oi a considerable number oit embodiments, it is C7 aac therefore to be understood that the anpend ed clainis are not to be limited or restricted to a construction having` the j )ai'ticular and exact structural ti. tures of 'that herein described and set torth. litany changes lnajv be inade in a, device ot this character ivitln out departure trein the substance ot the iiiveutiou and without the sacrilice ot any especial benetits or advantages.

.i claiin:

l. lu a device ot the character described, the combination ot a brake-beam, a brakehead adapted to t on and rotatabljT adjustable on said hrale-beain, a lock-block in a recess et said bralrcbeani adapted to hear against an inner surface or said head to maintain the latter in adjusted position, and actuating means vtor said block to torce the. latter into locking contact with said head, said actuating means e);tending.;` through an aperture oit said head and operable troni the exterior oit said head, sul stantialljY as described.

ln a device ot the character described, the combination ot a brake-beam having` a recess in its outer surface, a brake-head adapted to tit on and rotatablj7 adj stable on said brake-beam, a loch-block in said re cess and adapt-ed to bear against an inner su rtace ot said head to maintain the latter in adjusted position, loclebloclr having` an undercut groove, a bolt extended through. a hole in said bralre-head and having,v its head in the undercut groove ot said loch-bloeit, and nut on said bolt adapted to actuate the latter, vm ereby to torce said block into locking contactivith said head, substantiallj7 as described.

in a device ot the character described, the combination oit a brake-beam, a recessed sleeve fitted on the end ot said beain, a locle block in said recess, a bralrediea d adapted to titon and rotatabljT adjustable on said sleeve, and actuating ineans tor said lock-block eirtending through said brake-head and operable troin the outside thereoit, vvherebj/v to torce said block into locking engagement with the interior oit said head to hold said head .in adjusted position, substantially as described.

d. in a device of the character described, the combination of a brake-beam, a recessed sleeve iitted on. the end ot said bralrebeain, said sleeve having an open-cnded groove con'ununicating with said recess, a loclr bloclr in said recess, a brake-head adapted to ht on and rotatably adjustable on said sleeve, a bolt extended through said bralre-head and cooperating With said lock-block, and a nut on said bolt outside ot said brake-head and adapted to actuate said bolt to torce said lock-block outuardlj7 into locking engageinent with the interior ot' said bralrediead, said sleeve-groove permitting the passage ot said bolt-head therethrough into coperative engagement With said lock-block, substantially as described.

5. In a device of the character described, the combination of a brake-beam, a recessed sleeve fitted on the end of said beam, a lockblock in said recess, a brake-head adapted to lit on and rotatably adjustable on said sleeve, and means to actuate said lock-block extended through said brake-head and operable from the outside of the latter, said block-actuating means having adjustable engagement with said block, whereby said block may be forced outwardly into locking engagement with the interior ot' said head to hold the latter in adjusted position, substantially as described.

(S. In a device orn the character described, the combination of a brake-beam, a recessed cylindrical sleeve fitted on an end of said brake-beam and provided with an openended groove communicating With said recess, a lock-block litted in said recess, said block having an undercut groove, a brakehead adapted to lit on and rotatably adjustable on said sleeve. and having an aperture extended therethrough, a bolt in said aperture, the head of said bolt being fitted and adjustable in the undercut groove of said lock-block, and a nut on said bolt out-side of said brake-head and adapted to actuate said bolt to draw said lock-block outwardly into locking engagement with the interior of said brake-head to hold the latter in adjusted position, said open-ended groove permitting the passage ot' the bolt-head therethrough, whereby to secure its entrance into the nndercut groove of said block While the lat-ter is in the sleeve recess, substantially as described.

7. The combination of a brake beam and a brake head, said beam carrying a locking block that is movable With relation to said beam and is arranged to bc pressed against the inner surface of said head to prevent rotation otl the lat-ter, said block having means for preventing Withdrawal of said head from said beam.

CHARLES F. MURRAY.

Vitnesses:

M. A. KIDDIE, VALTER M. FULLER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

